Sample tube rack



FIG. 1 is a front perspective view of a sample tube rack showing our newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a ride side elevational view thereof; and,

FIG. 7 is a rear elevational view thereof.

The ornamental design for a sample tube rack, as shown and described.